Re: [Boost-build] Errors when using target references to boostlibraries

Subject: Re: [Boost-build] Errors when using target references to boostlibraries
From: Johan Nilsson (r.johan.nilsson_at_[hidden])
Date: 2009-09-07 03:14:01

Bob Walters wrote:
> Johan Nilsson wrote:
>>> My goal is that using those targets avoids any
>>> need to try to
>>
>> Try to ... what?
>
> Sorry: Another victim of loss-of-focus.  I'm trying to avoid putting
> any specific library
> names in the Jamfile in order to keep it OS/variant/architecture
> neutral.
>
> I've tried the approach you suggested, on windows.  I'm still getting
> an odd problem - apparently
> with finding the aliases. (filesystem was the first alias in the
> library list when I ran this bjam):
>

[snip]

Strange. The following "nonsense project" works for me verbatim using 
msvc-8.0 with Boost/Boost.Build/Boost.Jam combo from both 1.34.1 and current 
trunk:

-- Jamroot --
import os ;

path-constant BOOST_ROOT : [ os.environ BOOST_ROOT ] ;
use-project /boost : $(BOOST_ROOT) ;

alias boost_thread : /boost//thread ;
alias boost_date_time : /boost//date_time ;

project bar
 :
 requirements
 <include>$(BOOST_ROOT)
 <link>static
 ;

lib foo
 :
 foo.cpp
 boost_thread
 boost_date_time
 ;

exe bar
 :
 main.cpp
 foo
 ;

-- foo.cpp --
#include <boost/thread/thread.hpp>
#include <boost/lambda/lambda.hpp>

extern int foo()
{
 int result = 0;

 boost::thread t(boost::lambda::var(result) = 1);

 t.join();

 return result;
}

-- main.cpp --
int foo();

int main(int, char*[])
{
 return foo();
}
--------------------

What is the actual value of BOOST_ROOT in environment?

/ Johan